Mum my teacher Miss Gao.A. she isB. he isC. this areD. this is

问题补充：

Mum, my teacher, Miss Gao.

A. she is

B. he is

C. this are

D. this is

答案：

A. she is

B. he is

C. this are

(答案→)D. this is

解析：句意：妈妈，这是我的老师，高小姐。在英语中习惯用句型This is…向对方介绍第三者，所以选 D。